Combined concentrated sulfuric acid storage tank feeding pipe structure

Abstract

The utility model relates to the technical field of feeding structures of concentrated sulfuric acid storage tanks, and discloses a combined type feeding pipe structure of a concentrated sulfuric acid storage tank, a feeding assembly comprises a double-faced lining PTFE pipe, a carbon steel straight pipe and a carbon steel taper pipe, an outer sleeve is installed on the top side of a concentrated sulfuric acid storage tank body, and a flange is arranged on the top of the outer sleeve. The double-faced lining PTFE pipe sequentially penetrates through the flange, the outer sleeve and the concentrated sulfuric acid storage tank body, a fixing assembly is arranged in the concentrated sulfuric acid storage tank body, the carbon steel straight pipe is installed on the fixing assembly, and the carbon steel taper pipe is installed at the top of the carbon steel straight pipe; by means of the combination mode, the advantages that the double-face lining PTFE pipe is high in concentrated sulfuric acid corrosion resistance and the metal inner wall of the concentrated sulfuric acid storage tank body can easily support and reinforce the carbon steel straight pipe are fully played, meanwhile, the carbon steel taper pipe and the carbon steel straight pipe in the concentrated sulfuric acid storage tank body are convenient to maintain, and the concentrated sulfuric acid storage tank has the advantages of being easy to construct, install and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of the feeding structure of concentrated sulfuric acid storage tanks, in particular to a combined feeding pipe structure for a concentrated sulfuric acid storage tank. Background Technique

[0002] The feeding pipes on concentrated sulfuric acid storage tanks usually adopt conventional carbon steel or austenitic stainless steel pipes and are connected to the outer pipes through flanges. Due to reasons such as temperature and flow rate, concentrated sulfuric acid has strong corrosiveness to conventional carbon steel and austenitic stainless steel. In the past, leakage of the feeding pipes often occurred with this kind of structure and material of the feeding pipes. Since concentrated sulfuric acid has strong corrosiveness and the feeding pipes are located at the top of the tank, it brings great trouble and annoyance to the maintenance work after leakage. In order to prevent the leakage of the feeding pipes caused by the corrosion of concentrated sulfuric acid, people began to consider double-sided PTFE-lined pipes with stronger corrosion resistance to concentrated sulfuric acid. The double-sided PTFE-lined pipes can effectively solve the problem of leakage of the feeding pipes caused by the corrosion of concentrated sulfuric acid. However, the corresponding problem is that for large concentrated sulfuric acid storage tanks with a height of 12 - 16 m, if the feeding pipes are inserted from the top of the tank to the bottom of the tank, the manufacturer of double-sided PTFE-lined pipes can usually only manufacture specifications of 5 - 6 m for each section. Such a height requires 3 - 4 sections of double-sided PTFE-lined pipes to be spliced and assembled. After 3 - 4 sections are spliced and assembled and installed on the flange at the top of the tank, when feeding into the pipe, relying only on the pre-tightening force of the bolts, the spliced and assembled PTFE-lined pipes will shake, causing leakage of the flange sealing surface. On the other hand, since it is a double-sided PTFE-lined pipe, the outer wall of the pipe is non-metallic PTFE and the inner wall of the storage tank is metal carbon steel. It is relatively difficult to use the tank wall to support and reinforce the double-sided PTFE-lined pipe; if the feeding pipes are not inserted from the top of the tank to the bottom of the tank and only one section of double-sided PTFE-lined pipe is used, there is no problem with sealing relying on the pre-tightening force of the bolts, but a new problem is that the bottom of the double-sided PTFE-lined pipe is about 10 m away from the bottom of the tank. When feeding, the concentrated sulfuric acid fluid will generate huge impact and noise on the bottom of the tank. Therefore, a combined feeding pipe structure for a concentrated sulfuric acid storage tank is proposed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a combined feeding pipe structure for a concentrated sulfuric acid storage tank to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A combined feeding pipe structure for a concentrated sulfuric acid storage tank, including a concentrated sulfuric acid storage tank body, and a feeding assembly is arranged inside the concentrated sulfuric acid storage tank body;

[0005] The feeding assembly includes a double-sided PTFE-lined pipe, a carbon steel straight pipe, and a carbon steel tapered pipe. A jacket pipe is installed on the top side of the main body of the concentrated sulfuric acid storage tank. A flange is provided at the top of the jacket pipe. The double-sided PTFE-lined pipe sequentially passes through the flange, the jacket pipe, and the inside of the main body of the concentrated sulfuric acid storage tank. A fixing assembly is arranged inside the main body of the concentrated sulfuric acid storage tank. The carbon steel straight pipe is installed on the fixing assembly, and the carbon steel tapered pipe is installed on the top of the carbon steel straight pipe.

[0006] Preferably, the top of the double-sided PTFE-lined pipe is located above the flange, and one end of the double-sided PTFE-lined pipe is inserted into the inside of the carbon steel tapered pipe.

[0007] Preferably, a positioning column is installed inside the carbon steel tapered pipe, and one end of the positioning column is arranged outside the double-sided PTFE-lined pipe.

[0008] Preferably, the fixing assembly includes fixing rib plates. The fixing rib plates are fixedly connected to the inner side wall of the main body of the concentrated sulfuric acid storage tank, and the end of the fixing rib plate away from the main body of the concentrated sulfuric acid storage tank is installed on the outside of the carbon steel straight pipe.

[0009] Preferably, the fixing assembly includes a fixing column, a connecting plate, and a limiting plate. The fixing column is fixedly connected to the inner side wall of the main body of the concentrated sulfuric acid storage tank. The connecting plate is movably sleeved on the outside of the fixing column. The limiting plate is fixedly connected to one side of the connecting plate. A limiting groove is formed in the limiting plate. A guide post is fixedly connected to the outside of the carbon steel straight pipe, and a slot is formed at one end of the fixing column.

[0010] Preferably, the guide post and the slot are mutually matched, and the guide post is inserted into the inside of the slot.

[0011] Preferably, the limiting groove and the carbon steel straight pipe are mutually matched, and the carbon steel straight pipe is located inside the limiting groove.

[0012] Compared with the prior art, the present utility model adopts the above technical solutions and has the following technical effects:

[0013] Through a combined method, the present utility model gives full play to the advantages that the double-sided PTFE-lined pipe has strong corrosion resistance to concentrated sulfuric acid and the metal inner wall of the main body of the concentrated sulfuric acid storage tank is easy to support and reinforce the carbon steel straight pipe. At the same time, it is very convenient to repair the carbon steel tapered pipe and the carbon steel straight pipe inside the main body of the concentrated sulfuric acid storage tank, and it has the characteristics of simple construction, installation, and maintenance. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 Schematic cross-sectional structure diagram of the present utility model;

[0016] Figure 2 Schematic structure diagram of the fixed column of the present utility model;

[0017] Figure 3 Schematic structure diagram of the connecting plate of the present utility model;

[0018] Figure 4 Schematic structure diagram of the limiting plate of the present utility model;

[0019] Figure 5 Schematic cross-sectional structure diagram of the fixed column of the present utility model.

[0020] Explanation of reference numerals: 1. Flange; 2. Outer sleeve; 3. Double-sided PTFE-lined pipe; 4. Carbon steel taper pipe; 5. Fixed rib plate; 6. Carbon steel straight pipe; 7. Concentrated sulfuric acid storage tank body; 8. Fixed column; 9. Connecting plate; 10. Limiting plate; 11. Limiting groove; 12. Guide post; 13. Slot; 14. Positioning column. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0022] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present application can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present application can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed in the present application can cover.

[0023] Embodiment 1

[0024] Please refer to Figure 1, the present utility model provides a technical solution: a combined sulfuric acid storage tank feed pipe structure, including a sulfuric acid storage tank body 7, and a feed assembly is arranged inside the sulfuric acid storage tank body 7;

[0025] The feed assembly includes a double-sided PTFE-lined pipe 3, a carbon steel straight pipe 6, and a carbon steel tapered pipe 4. An outer sleeve pipe 2 is installed on the top side of the sulfuric acid storage tank body 7, and a flange 1 is arranged at the top of the outer sleeve pipe 2. The double-sided PTFE-lined pipe 3 sequentially passes through the flange 1, the outer sleeve pipe 2, and the inside of the sulfuric acid storage tank body 7. A fixing assembly is arranged inside the sulfuric acid storage tank body 7. The carbon steel straight pipe 6 is installed on the fixing assembly, and the carbon steel tapered pipe 4 is installed on the top of the carbon steel straight pipe 6; the top of the double-sided PTFE-lined pipe 3 is located above the flange 1, and one end of the double-sided PTFE-lined pipe 3 is inserted into the inside of the carbon steel tapered pipe 4; when feeding into the top of the sulfuric acid storage tank body 7, the feed pipe is connected to the flange 1, and sulfuric acid flows into the tank successively through the double-sided PTFE-lined pipe 3, the carbon steel tapered pipe 4, and the carbon steel straight pipe 6. Through the combined method, the strong sulfuric acid corrosion resistance of the double-sided PTFE-lined pipe 3 is fully utilized.

[0026] In order to assist the double-sided PTFE-lined pipe 3 to be centered, a positioning column 14 is installed inside the carbon steel tapered pipe 4. One end of the positioning column 14 is arranged on the outer side of the double-sided PTFE-lined pipe 3, and the positioning column 14 can resist the outer side of the double-sided PTFE-lined pipe 3 to ensure that the double-sided PTFE-lined pipe 3 is centered inside the carbon steel tapered pipe 4.

[0027] The fixing assembly includes a fixing rib plate 5. The fixing rib plate 5 is fixedly connected to the inner side wall of the sulfuric acid storage tank body 7. The end of the fixing rib plate 5 away from the sulfuric acid storage tank body 7 is installed on the outer side of the carbon steel straight pipe 6. The metal inner wall of the sulfuric acid storage tank body 7 is easy to support and reinforce the carbon steel straight pipe 6. At the same time, it is very convenient to repair the carbon steel tapered pipe 4 and the carbon steel straight pipe 6 inside the sulfuric acid storage tank body 7, and it has the characteristics of simple construction, installation, and maintenance.

[0028] Working principle or structural principle: when feeding into the top of the sulfuric acid storage tank body 7, the feed pipe is connected to the flange 1, and sulfuric acid flows into the tank successively through the double-sided PTFE-lined pipe 3, the carbon steel tapered pipe 4, and the carbon steel straight pipe 6. Through the combined method, the advantages of the strong sulfuric acid corrosion resistance of the double-sided PTFE-lined pipe 3 and the easy support and reinforcement of the carbon steel straight pipe 6 by the metal inner wall of the sulfuric acid storage tank body 7 are fully utilized. At the same time, it is very convenient to repair the carbon steel tapered pipe 4 and the carbon steel straight pipe 6 inside the sulfuric acid storage tank body 7, and it has the characteristics of simple construction, installation, and maintenance.

[0029] Embodiment 2

[0030] Please refer to Figures 2 - 5, different from Embodiment 1: By providing a fixing assembly, it is convenient to maintain the carbon steel taper pipe 4 and the carbon steel straight pipe 6. The fixing assembly includes a fixing column 8, a connecting plate 9 and a limiting plate 10. The fixing column 8 is fixedly connected to the inner side wall of the concentrated sulfuric acid storage tank body 7. The connecting plate 9 is movably sleeved on the outside of the fixing column 8. The limiting plate 10 is fixedly connected to one side of the connecting plate 9. A limiting groove 11 is formed on the limiting plate 10. A guide post 12 is fixedly connected to the outside of the carbon steel straight pipe 6. A slot 13 is formed at one end of the fixing column 8; the guide post 12 and the slot 13 are mutually matched, and the guide post 12 is inserted into the inside of the slot 13; the limiting groove 11 and the carbon steel straight pipe 6 are mutually matched, and the carbon steel straight pipe 6 is located inside the limiting groove 11; during disassembly, by simultaneously pushing the connecting plate 9 to rotate on the outside of the fixing column 8, the connecting plate 9 drives the limiting plate 10 to rotate by 90 degrees. During this process, the limiting plate 10 moves away from the outside of the carbon steel straight pipe 6, and at the same time the carbon steel straight pipe 6 disengages from the inside of the limiting groove 11. At this time, the carbon steel straight pipe 6 can be pulled outwards to move, so that the carbon steel straight pipe 6 drives the guide post 12 to disengage from the inside of the slot 13, and the disassembly of the carbon steel taper pipe 4 and the carbon steel straight pipe 6 can be completed. The operation is simple and fast, greatly improving the maintenance efficiency of the carbon steel taper pipe 4 and the carbon steel straight pipe 6;

[0031] During installation, by simultaneously pushing the two connecting plates 9 to drive the limiting plate 10 to flip, and then inserting the guide post 12 on the carbon steel straight pipe 6 into the inside of the slot 13, so that the carbon steel straight pipe 6 abuts against one end of the fixing column 8, and then putting down the connecting plate 9, the limiting plate 10 flips and moves to the outside of the carbon steel straight pipe 6, so that the carbon steel straight pipe 6 is located inside the limiting groove 11, and the installation of the carbon steel taper pipe 4 and the carbon steel straight pipe 6 can be completed, saving time and effort; at the same time, in order to facilitate the fixation of the position of the limiting plate 10, a fixing bolt is threadedly connected to one side of the limiting plate 10, and one end of the fixing bolt abuts against the outside of the fixing column 8. The position of the limiting plate 10 after flipping can be fixed by the fixing bolt, assisting in the installation and disassembly of the carbon steel taper pipe 4 and the carbon steel straight pipe 6.

[0032] Working principle or structural principle. When it is necessary to disassemble and maintain the carbon steel taper pipe 4 and the carbon steel straight pipe 6, first disassemble the double-sided PTFE-lined pipe 3, and then by simultaneously pushing the connecting plate 9 to rotate outside the fixed column 8, the connecting plate 9 drives the limiting plate 10 to rotate 90 degrees. During this process, the limiting plate 10 moves away from the outside of the carbon steel straight pipe 6, and at the same time, the carbon steel straight pipe 6 disengages from the inside of the limiting groove 11. At this time, the carbon steel straight pipe 6 can be pulled outwards to move, so that the carbon steel straight pipe 6 drives the guide post 12 to disengage from the inside of the slot 13, and the disassembly of the carbon steel taper pipe 4 and the carbon steel straight pipe 6 can be completed. The operation is simple and fast, which greatly improves the maintenance efficiency of the carbon steel taper pipe 4 and the carbon steel straight pipe 6; when it is necessary to install the carbon steel taper pipe 4 and the carbon steel straight pipe 6, by simultaneously pushing the two connecting plates 9 to drive the limiting plate 10 to flip, and then insert the guide post 12 on the carbon steel straight pipe 6 into the inside of the slot 13, so that the carbon steel straight pipe 6 abuts against one end of the fixed column 8, and then put down the connecting plate 9, the limiting plate 10 flips and moves to the outside of the carbon steel straight pipe 6, so that the carbon steel straight pipe 6 is located inside the limiting groove 11, and the installation of the carbon steel taper pipe 4 and the carbon steel straight pipe 6 can be completed, saving time and effort.

[0033] Those skilled in the art can understand that the features recited in the various embodiments and / or claims of the present invention can be combined or / and combined in various ways, even if such combinations or combinations are not explicitly recited in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recited in the various embodiments and / or claims of the present invention can be combined and / or combined in various ways. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A combined feed pipe structure for concentrated sulfuric acid storage tank, comprising a concentrated sulfuric acid storage tank body (7), characterized in that: An inlet component is arranged inside the concentrated sulfuric acid storage tank body (7); The inlet component includes a double-sided PTFE-lined pipe (3), a carbon steel straight pipe (6) and a carbon steel tapered pipe (4). An outer sleeve pipe (2) is installed on the top side of the concentrated sulfuric acid storage tank body (7). A flange (1) is arranged at the top of the outer sleeve pipe (2). The double-sided PTFE-lined pipe (3) sequentially penetrates through the flange (1), the outer sleeve pipe (2) and the inside of the concentrated sulfuric acid storage tank body (7). A fixing component is arranged inside the concentrated sulfuric acid storage tank body (7). The carbon steel straight pipe (6) is installed on the fixing component. The carbon steel tapered pipe (4) is installed on the top of the carbon steel straight pipe (6).

2. The structure of the combined concentrated sulfuric acid storage tank feed pipe according to claim 1, characterized in that: The top of the double-sided PTFE-lined pipe (3) is located above the flange (1), and one end of the double-sided PTFE-lined pipe (3) is inserted into the inside of the carbon steel tapered pipe (4).

3. The structure of the combined concentrated sulfuric acid storage tank feed pipe according to claim 1, wherein: A positioning column (14) is installed inside the carbon steel tapered pipe (4), and one end of the positioning column (14) is arranged on the outer side of the double-sided PTFE-lined pipe (3).

4. A combined sulfuric acid storage tank feed pipe structure according to claim 1, characterized in that: The fixing component includes a fixing rib plate (5). The fixing rib plate (5) is fixedly connected to the inner side wall of the concentrated sulfuric acid storage tank body (7), and the end of the fixing rib plate (5) away from the concentrated sulfuric acid storage tank body (7) is installed on the outer side of the carbon steel straight pipe (6).

5. The structure of the combined sulfuric acid storage tank feed pipe according to claim 1, characterized in that: The fixing component includes a fixing column (8), a connecting plate (9) and a limiting plate (10). The fixing column (8) is fixedly connected to the inner side wall of the concentrated sulfuric acid storage tank body (7). The connecting plate (9) is movably sleeved on the outer side of the fixing column (8). The limiting plate (10) is fixedly connected to one side of the connecting plate (9). A limiting groove (11) is formed in the limiting plate (10). A guide post (12) is fixedly connected to the outer side of the carbon steel straight pipe (6). A slot (13) is formed at one end of the fixing column (8).

6. The structure of a combined concentrated sulfuric acid storage tank feed pipe according to claim 5, characterized in that: The guide post (12) and the slot (13) are mutually matched, and the guide post (12) is inserted into the inside of the slot (13).

7. The structure of the combined concentrated sulfuric acid storage tank feed pipe according to claim 5, characterized in that: The limiting groove (11) and the carbon steel straight pipe (6) are mutually matched, and the carbon steel straight pipe (6) is located inside the limiting groove (11).

Images